S
M
T
W
T
F
S
29
37°
23°
30
36°
22°
1
36°
24°
2
37°
29°
3
38°
30°
4
41°
30°
5
42°
33°
6
43°
32°
7
41°
31°
8
37°
29°
9
34°
26°
10
35°
26°
11
46°
30°
12
43°
27°
13
47°
23°
14
38°
19°
15
34°
22°
16
35°
21°
17
32°
24°
18
37°
28°
19
39°
31°
20
44°
31°
21
45°
30°
22
46°
30°
23
44°
32°
24
47°
27°
25
47°
21°
26
44°
18°
27
31°
20°
28
34°
28°
29
42°
28°
30
43°
30°
31
45°
32°
1
46°
27°
2
46°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Marion
Marion's December 2026 forecast shows daily high temperatures ranging from 31° to 47°, with overnight lows between 18° and 33°. The average high for December is 40° with an average low of 27°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Marion. See also: January | February | March.
